Dictionary of Ichthyology
protopterygium = one of the three basal cartilages of the pectoral fin in the the sharks and rays along with the protopterygium and mesopterygium, both q.v.
|
Dictionary of Ichthyology |
|
|
|
protopterygium = one of the three basal cartilages of the pectoral fin in the the sharks and rays along with the protopterygium and mesopterygium, both q.v. |
| Shoulder girdle and proximal part of pectoral fin of Raja, g = right half of girdle, ms = mesopterygium, mt = metapterygium, p = protopterygium, r = radii of fin, from Kingsley's "Textbook of Vertebrate Zoology, 1906. Photograph by Brian W. Coad. |